Athena`
吹水學徒
...............
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註冊 2005-12-19
註冊天數 6943
狀態 離線
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1. 4 0 - 1 2 . 9 m = 1 4 . 2
-12.9m = 14.2 - 40
-12.9m = -25.8
m = -25.8 / -12.9
m = 2
2. 5 ( n - 3 ) = 1 0
5n - 15 = 10
5n = 25
n = 5
3. r ( 1 + 2 7 % ) = 3 8 . 1
r = 38.1/ 1.27
r = 30
1 1 b 1 3
4. ---------- - 2 ------ = 2 -------
3 0 4 2 0
2(11b) 135 129
---------- - ------- = --------
60 60 60
22b - 135 = 129
22b = 246
b = 12
5. 3 ( 1 4 - x ) = 24
14 - x = 8
-x = - 6
x = 6
6. 3 . 8 y - 4 2 . 9 3 = 5 9 . 6 7
3.8y = 102.6
y = 27
2 3
7. k ( 2 - ----- ) = 9 ----
5 5
2k - 2k = 48
----- -------
5 5
10k -2k = 48
8k =48
k =6
8. e ( 1 - 1 9 % ) = 8 0 . 1 9
e (1-0.19) = 80.19
e = 80.19/0.81
e = 99
9. 3 2 - 3 a = 8
-3a = -24
a = 8
t
10. 16 - ---- = 6
7
112 - t = 42
t = 70
[ 本帖最後由 Athena` 於 2007-2-4 12:13 PM 編輯 ]
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